What is the R value of 2 Inches of Spray Foam Insulation?

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Did you know that when 2 lb spray foam insulation is first installed it rates at an R value of 10 per inch?! But then it loses some of that value over the next month. In this video we explain what is happening and how to properly see what your installed Long Term Thermal Resistance Value (LTTR) will be.
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29 сен 2024

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Комментарии : 117

@scruffy6151 3 года назад

I did close cell on a house I worked on in 3 1/2" studs. I filled the whole cavity the owner said the wall is day and night different than all the other walls in the house.

@SprayJones 3 года назад

Yes, foam it great.

@paulbrennan6613 3 года назад

I did also the same thing now it cost more to bring gas service in then the amount of gas used

@josephkrsnak8691 3 года назад

Freon is a generic trade name for a brand of many refrigerants what gas is used? Joe

@SprayJones 3 года назад

We were using HFC 245 Fa. It is now 2021 an HFO

@michaelleuth7557 2 года назад

One night I watched all 4 of your videos on unvented roofs in a row. Learned so much. We definitely need to revise our r values.

@rogerwhiting9310 4 месяца назад

I am just about ready to closed cell spray my top floor walls, dormers and roof with 2 inches of closed cell..after watching your videos. You have probably covered what ELSE would help prevent transferring the temperature OUTSIDE to the INSIDE. Some are advocating radiant barrier..aluminum bubble wrap under the foam. My big concern is transfer through the dimensional support lumber...2x6, etc. Would a thin layer of foam insulation boardbetween the drywall and the 2x6, etc help lower the transfer. I cant build a second wall with air space as some do. Thanks

@notransfat1 Год назад

4:00 You said freon. Freon is a brand name registered to duPont. The term is used broadly and can mean a lot of different things, kind of like the word Kleenex. The question is what is the actual chemical blowing agent in that purple foam and what is it's GWP?

@SinnisjInsulator 3 года назад

I never thought of that freon having to go through a 1inch thick foam to be released in a 3 inch layer. Well explained. Plus that btu retention. I will need to look at a table for loosefill.

@turboflush 3 года назад

You looking to pick up spray foam also?

@SinnisjInsulator 3 года назад

@@turboflush hey Turbo, funny that you saw my comment here, what are the odds, I guess this channel is getting pretty popular. I am qualified to install spray foam, I took the 3 day course and have about a year experience, but haven't installed it in the past year. I am the attic loosefill installer now, probably because of my small stature lol.

@vincecolburn7820 3 года назад

Would there be any advantages to spraying 2" then coming back a couple of days later and spraying another 1" ? Would that seal in the gasses and prevent them from migrating out? Thanks, Vince

@SprayJones 3 года назад

No. The aging still applies to the next layer. So all that can be done is to base your decisions on the LTTR value and spray what you need. Good questions BTW

@vincecolburn7820 3 года назад

@@SprayJones Thanks for your response. Love your videos.

@jasontorres9968 3 года назад

@@SprayJones Is there any spray on sealer that could be then sprayed over the 2 inch layer that would prevent the freon from escaping?

@SprayJones 3 года назад

@@jasontorres9968 No. It is all part of the process.

@pjevans1830 3 года назад

Enjoying your videos. We have been spraying our houses for several years now. I live in Iowa and we typically apply 2" of closed cell to concrete basement walls and fully fill 2x6 stud cavities with open cell. By the way I sub out this process to an insulation contractor. My question is this, how critical is the thickness of the closed cell? My guy says an "average " of 2" . In some places it will be closer to 3" and other places it might be 3/4". Should I say something to him about this issue or is it not that critical? I appreciate your thoughts and the videos you are making.

@SprayJones 3 года назад

If we are doing it at 2 inch closed cell will be 1.75" - 2.25". I have had customer try to get us to come back for even touching up that spec. If we have 3/4" and then 3" would be getting a phone call. Your installer needs to get better.

@skyline5354 3 года назад

Will you be doing a spray and batt video comparison with your thermal camera?

@SprayJones 3 года назад

Yes

@lazaruslazuli6130 10 месяцев назад

35 years as a residential building contractor. R-30 in a wall is fantastic in any zone of North America. I built many homes with a total value of R-22 in the walls and R-30 in the ceilings. In several homes I installed a radiant barrier under the decking and R-19 insulation in the ceiling joists, which gave an equivalent of R-52, according to the radiant barrier mfg. For an exposed floor (like a vacation A-frame cabin) R-30 in the floor is desired. Cost of foam vs fiberglass batts would be the major consideration. Some applications (like a dome home) with irregular surfaces/spaces would definitely be easier with a foam insulation. I did a job where we built a stick home inside a Quonset Hut with 2x6 framing. The walls got 5.5" of a latex-based foam. The soundproofing and insulation value was great.

@SprayJones 10 месяцев назад

Thanks for watching.

@DevilTravels 3 года назад

How does the ban on freon affect regulations on using this? And, since Freon is artificially more expensive due to market forces, doesn't this increase the cost of closed cell over open cell?

@SprayJones 3 года назад

Blowing agents are constantly changing. You want to know what disrupts pricing? Breaks in the chain of supply.

@marshallcollins8634 2 месяца назад

I wish you were in Georgia

@bretfairchild456 3 года назад

Interesting and informative videos you put on! Question. Would there be an advantage to spray say 2" of close cell into a 6" stud wall, and then top it with 4" open cell to complete the cavity? Thanks

@SprayJones 3 года назад

No. Next week will be an advanced look at flash and batt. That will answer a lot of questions and address myths.

@bp4170 3 года назад

Great info you provide! Is there any health or environmental issues to be aware of while the foam is off gassing?

@SprayJones 3 года назад

We are rated to Zero VOC within 24 hours. I have a health and safety playlist to watch more on. Will be doing a specific video for SPF toxicity

@This1LifeWeLive 3 года назад

Interesting, I didnt know it lost r value overtime. But if the freon leaks out, isn't that poisonous? I know it's a slow leak, but still.... also, does it need to be applied over the face of the studs? Are owners still able to add walls when thats done? Can you put nails through it?

@SprayJones 3 года назад

1. Not poisonous. That's why we have VOC ratings. Paint evaporates ammonia to cure.... 2. No to application over studs. Watch thermal bridging video just released. 3. Design changes happen all the time 4. ANything that will cut or puncture wood will do the same to foam insulation of any kind.

@trevorhardy3544 Год назад

Freon!? I had no idea. That makes me not want to never use spray foam.

@SprayJones Год назад

Ok, then dump air conditioning too.

@timsimmons9995 Год назад

Would love to see a video of RETRO FITTING spray foam into existing structure without having to tear off walls, which is cost prohibitive and labor intensive. Are there products that allow for filling walls thru holes and hoses?

@andybrooke1961 3 года назад

All your videos are helpful, thanks

@SprayJones 3 года назад

Glad you like them!

@1TomWalker 2 года назад

For a new Honka log home construction in Buena Vista, CO , what would you recommend? Open or closed cell foam? how thick for ideal R value? What brand of foam? This would be for the framed exterior sections of the home. Also, what about a spray foam between floors for noise reduction?

@brianlee6849 3 года назад

So how many inches do think is a good cost effective choice? I'm in florida so I have been thinking about sips or closed cell for the added structural integrity. Thanks 👍

@SprayJones 3 года назад

SPF at 3 inches

@brianlee6849 3 года назад

@@SprayJones With zip sheeting or plywood? Do you normally spray after the plumbers electricians and other tradesmen to seal any holes? Thanks 👍

@christophergruenwald5054 2 года назад

@@brianlee6849 always

@eastside0434 Год назад

With so much that can go wrong how would someone actually trust a contractor to apply foam.?

@SprayJones Год назад

Do you fly in a plane?

@eastside0434 Год назад

@@SprayJones I wonder if that's where fly by night came from.

@NeedsMoreToys 3 года назад

Interesting tidbit about the gas’s not leaking in the core layers.

@dekebell3307 Год назад

Thank you for making all these videos!

@allstarpawn396 Год назад

I am rebuilding a old house. I cant afford a professional to spray foam this home, but after learning from your channel how useless fiberglass is, I am considering polystyrene sheets in the wall cavities then sealing all the edges and joints with expanding foam. Is this practical?

@SprayJones Год назад

If not complicated. Everything with board stock relies on perfection to work. Any gap between the board and siding is where water can sit. Any gaps around the perimeter will let air in to sit inside. You won't know it is happening until there is a lot of damage. So this is the down side to this.

@kennethiman2691 3 года назад

I have never understood how fiberglass can have such high "R" value. A thin layer of foam allows you drink hot coffee with no issue. It clearly creates a thermal barrier. That said, bottom line. Is 2" of foam in a 2x4 wall superior to fiberglass for "R" value?

@SprayJones 3 года назад

Yes. By a factor of X6! I will be doing a comparison video with thermal image scans.

@Serious-Man 3 года назад

@@SprayJones We want to see this! Thanks.

@SprayJones 3 года назад

@@Serious-Man You will.

@blazegbs 3 года назад

@@SprayJones Howdy, ball park time frame when your going to publish that video? I’m having the “Dream Shop” built middle of March (lower Michign) & I’m deep in the weeds from all the “experts” telling me what I need between spray, fiberglass, silver back. Thanks for the information on spray.

@SprayJones 3 года назад

@@blazegbs I just shot a :46 sec video that should end all discussion for you. Watch for a post on YT today and you can watch it.

@D8099. 3 года назад

So educational. I want to renovate a home built 1980 in Dallas. Gut walls. Add a second row of 2x4 to make walls 2x8. I’d love to do all closed cell but may do flash/Bat. Brick is painted with 50 year elastomeric PSINT. It’s like rubber. I also want to fill the 1 inch cavity between brick and outer 2x4. Simply because brick cannot absorb water. I hate that the brick isn’t part of the insulation. It’s literally 4 inch of stone with a liquid vapor barrier outside also acting as PSINT. Would love to see a video on a remodel. Also considering putting the zip green board sheathing inside since I have brick outside. To completely cover studs so there are no thermal breaks. I know this is completely reversed engineered.

@SprayJones 3 года назад

I will be doing a e Flash and Batt video. So stay tuned.

@seanconroy8754 Год назад

Mike- how long till the environmentalists stop the use of freon in CC foam? Keep up the good work- really like you video work!!

@SprayJones Год назад

Already has happened. The HFO we use now is crap compared to the HCFC we used 15 years ago.

@ericcecil6605 3 года назад

How much CO2 or Freon is released into the atmosphere when you're spraying foam? Just curious about the environmental friendliness of foam.

@SprayJones 3 года назад

I do not know. Less waste than melting rocks and glass and having to use a kiln to produce a product that uses more energy being to be created then it ever can save in use.

@phil94123 2 года назад

Why is air leakage not used in the R value of a home? Isn't most of a homes thermal loss from air leakage through walls, receptacles, gaps, ect?

@SprayJones 2 года назад

Ppl are paid not to see it.

@hvacr-1258 3 года назад

A question I have out of curiosity since my profession is a refrigerant fitter. You say Freon is one of the gasses I'm assuming there is a refrigerant being used as a propellant? Do you know what refrigerant(s) they use? Thanks for the great content trying to educate myself before hiring a contractor to spray the underside of my roof.

@SprayJones 3 года назад

We used to use HFC of 245 Fa. Now 2021 we are using HFO blowing agent.

@jwristen24 2 года назад

Wonder if there's a product to prevent outgasing for long term value? Some kind of epoxy paint perhaps?

@SprayJones 2 года назад

No. You are missing the point a bit. There is a certain amount of loss that cannot be stopped, instead it is accounted for in calculations. Just like horse power loss at altitude for aircraft.

@John-tq4bf 2 года назад

I find it hard to fathom that the freon could be completely dispersed and replaced by air. Is the freon pressurized inside the foam? If it is pressurized surely then it would simply lose the positive pressure which would not leave room for air to infiltrate since the pressures are now in balance? I find it much easier to understand wall performance as that figure more closely relates to overall value of heat input vs heat loss since it is based on time. It is sort of using thermal mass relationships or am I completely scrambled?

@SprayJones 2 года назад

Not completely replaced.... diluted. Aged values are CCMC mandatory.

@NeedsMoreToys 3 года назад

Something you might consider for a future video is if something can be added to foam to kill any burrowing type insects. If yes, I think we have found the holy grail of insulation.

@christophergruenwald5054 2 года назад

It doesn’t provide a food source for them

@charlieedwards7970 3 года назад

I have questions about applying to a vaulted ceiling with metal roof outside. How do I contact you?

@SprayJones 3 года назад

Watch the 4 part series on non-vented roofs. Then if still concerned email via web site.

@rickmorales2113 2 года назад

Thank you so much, this series is excellently presented and well covers what should be known about spray foam. It gives me confidence in appying it at home and later in new metal building when retiring. You are the best, Kudos!!

@SprayJones 2 года назад

Glad it was helpful!

@skyline5354 3 года назад

In regards to having the basement foundation sprayed when there is no framing yet...how does the spray company deal with windows?

@SprayJones 3 года назад

Please watch my video on basements best practices. I address windows right in there.

@brettbarager9101 2 года назад

Isn't freon bad for the environment? If it leaks out over time, that can't be good! What about if there is a fire? Will the freon be released by the fire or does the fire destroy the freon?

@SprayJones 2 года назад

How bad is mining lithium for batteries?

@agentorange2554 3 года назад

Mind blown.

@SprayJones 3 года назад

Thanks for watching.

@paulstar2616 Год назад

Thanks for the info

@MrSir-wp3fr 3 года назад

Is there any health concerns with the freon evaporating over time?

@SprayJones 3 года назад

No. That is why the foam is rated for VOCs. It is zero within 24hrs.

@TheJonboix 3 года назад

I notice he is coating the 2*4 studs with foam. Will this be scraped off? Will it affect application of drywall?

@SprayJones 3 года назад

Scraped off... of course.

@TheJonboix 3 года назад

@@SprayJones Thank you for your reply. I am subscribed. I just saw a spray foam video where they put painters tape over the studs and then pull it off after spraying.

@kjohntv808 2 года назад

Really appreciate your knowledge

@SprayJones 2 года назад

I appreciate that!

@323guzmandavalos 3 года назад

Could I get an idea of how much money I would spend on a 50’x80’x18’walls 3 inches thick? We’re building our own home in Iowa and we’re looking into doing this for insulation

@SprayJones 3 года назад

I cannot. Too many variables. Sorry. Get a local in your area to quote you.

@323guzmandavalos 3 года назад

@@SprayJones thank you I was planning on doing 3 inches of spray foam and the other 3 with batt insulation but I just got done watching one of your other videos where you don’t recommend it. Keep up with the good content 👍

@squeekhobby4571 3 года назад

@@323guzmandavalos : looks like a huge house. Is it 2 storied? When you are requesting quote, can you ask the below info for cost analysis Closed cell Rock wool ------. ------ 1” 5” 2” 4” 3”. 3”

@janicealbrecht6661 3 года назад

You mentioned freon leaking from the cells over time. Does this make your home toxic? You also mentioned that the foam is under and over in places. If you had to scrape off some foam, does it compromise it's vapor barrier ability?

@SprayJones 3 года назад

1. Toxic? No it is not. I am doing a video specific to that very subject now as I type this. Facts to back that up. FYI. all products give something "off" 2. Vapor barrier? That is not found in the skin of 2lb foam. Please watch the vapor barrier video on this subject.

@mattlane2282 3 года назад

@@SprayJones Dude talks about freon... last I knew that was a refrigerant registered to DuPont... and I sure as hell would not want to breath it is... and fiberglass does not offgas... Can't wait to see what fiberglass or rockwool gives off (now)

@intertan 3 года назад

ok, fore someone trying to make there house so efficient that you can heat it with a hair dryer what is the best option? I have 2x6 studs.

@SprayJones 3 года назад

Where do you live?

@intertan 3 года назад

@@SprayJones Saskatoon.

@hu5tle- 2 года назад

R49 is required at the roof/attic. What do you guys do for that? I'm assuming you aren't doing 7 inches of foam.

@SprayJones 2 года назад

Get engneering written for SPF, not fibrous.

@hu5tle- 2 года назад

@@SprayJones My engineer only does structural. Not performance.

@SprayJones 2 года назад

@@hu5tle- Talk with energy wise structures in Texas. The consult and write specs for SPF.

@hu5tle- 2 года назад

@@SprayJones thanks!

@soggybottomboys2792 3 года назад

Isn’t freon a CFC?

@SprayJones 3 года назад

No. Freon is a trade name, we loosely use it to describe a hydrocarbon blowing agent. CFC has been banned since the early 90s.

@soggybottomboys2792 3 года назад

@@SprayJones yeah lmao thats why i asked I've got my cfc cert.

@GlenS123 3 года назад

Unclear to me why as over time Freon leaks out and is replaced by oxygen (air) lowers R-value. Freon and air are both gasses, the fact that it's not Freon matters that much? Air is in fiberglass, Rockwool, etc. Sprayfoams huge R-value over those products is because no airflow happens in the product itself wisking away heat.

@SprayJones 3 года назад

Not technically correct. The better insulating layer is created by the chlorine gas inside the freon. Over 40 years less chlorine has been allowed to be in the flourocarbon. Chlorine is very dense and inert so it takes the maximum amount of energy to get through it. Hence the better insulation. Oxygen is not inert and easy to transfer energy - this is why hot-air furnaces are used. This is just a small snap shot of what is really going on.

@account-ability_2583 3 года назад

@@SprayJones chlorine gas is definitely not inert. It is incredibly deadly and oxidizing. Is chlorine gas really found in SPF?

@SprayJones 3 года назад

@@account-ability_2583 No. You don't understand what inert means. We are NOT USING CHLORINE GAS!! The molecule strain in an HCFC is Hydrogen Chlorine Florine Carbon Chlorine is used in pools, drinking water, cleaners..... it is an element. No one is saying chlorine gas. It does not matter because the current chemistry eliminates chlorine from the chain.

@Bob.W. 3 года назад

Please do a segment on applying foam from the outside with sheathing removed but drywall intact. Thx.

@SprayJones 3 года назад

It is in the Que to be done. Maybe I'll bump it up you are the 3rd request in a month.

@scruffy6151 3 года назад

Remove the plastic vapor barrier if one was installed before sheetrock was put on before spraying it because, it causes the foam to sag. Making for a job that does not work right ask me how I learned this lol. Life lessons learned at my cost.

@Bob.W. 3 года назад

@@scruffy6151 good point. Thx.

@squeekhobby4571 3 года назад

Great stuff and presentation. When applying foam insulation to the exterior seating, I saw one where they applied a house wrap inside the seathing and applied the foam to it. In this way foam Does not stick to the seathing directly and might help in future maintenance or seathing replacement. Let me know your thought.

@SprayJones 3 года назад

No good. We want and NEED tight contact with the substrate to stop air and water from moving between the foam and substrate. The spray is to be tested for adhesion. People try to treat this like a sheet good. You are buying it FOR the adhesion and seal.

@squeekhobby4571 3 года назад

@@SprayJones : thanks for the points.